CodeLens not appearing for empty classes

## Environment data
`dotnet --info` output:
```log
.NET SDK (反映任何 global.json):
Version: 6.0.300
Commit: 8473146e7d

运行时环境:
OS Name: Windows
OS Version: 10.0.17763
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\6.0.300\

global.json file:
Not found

Host:
Version: 6.0.10
Architecture: x64
Commit: 5a400c212a

.NET SDKs installed:
2.2.401 [C:\Program Files\dotnet\sdk]
3.1.403 [C:\Program Files\dotnet\sdk]
5.0.413 [C:\Program Files\dotnet\sdk]
6.0.300 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.15 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Download .NET:
https://aka.ms/dotnet-download

Learn about .NET Runtimes and SDKs:
https://aka.ms/dotnet/runtimes-sdk-info
```
VS Code version:
```log
Version: 1.73.1 (system setup)
Commit: 6261075646f055b99068d3688932416f2346dd3b
Date: 2022-11-09T04:27:29.066Z
Electron: 19.0.17
Chromium: 102.0.5005.167
Node.js: 16.14.2
V8: 10.2.154.15-electron.0
OS: Windows_NT x64 10.0.17763
Sandboxed: No
```
C# Extension version: `v1.25.2`

## OmniSharp log
```
Starting OmniSharp server at 2022/11/17 19:34:45
Target: c:\Users\tengzhaoju\Desktop\Test

OmniSharp server started with .NET 6.0.300
.
Path: c:\Users\tengzhaoju\.vscode\extensions\ms-dotnettools.csharp-1.25.2-win32-x64\.omnisharp\1.39.2-net6.0\OmniSharp.dll
PID: 17736

[info]: OmniSharp.Stdio.Host
Starting OmniSharp on Windows 10.0.17763.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
Checking the 'DOTNET_ROOT' environment variable to find a .NET SDK
[info]: OmniSharp.Services.DotNetCliService
Using the 'dotnet' on the PATH.
[info]: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 1 MSBuild instance(s)
1: .NET Core SDK 6.0.300 17.2.0 - "C:\Program Files\dotnet\sdk\6.0.300\"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: .NET Core SDK 6.0.300 17.2.0 - "C:\Program Files\dotnet\sdk\6.0.300\"
[info]: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[info]: OmniSharp.Cake.CakeProjectSystem
Detecting Cake files in 'c:\Users\tengzhaoju\Desktop\Test'.
[info]: OmniSharp.Cake.CakeProjectSystem
Did not find any Cake files
[info]: OmniSharp.MSBuild.ProjectSystem
No solution files found in 'c:\Users\tengzhaoju\Desktop\Test'
[info]: OmniSharp.MSBuild.ProjectManager
Queue project update for 'c:\Users\tengzhaoju\Desktop\Test\Test.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
Detecting CSX files in 'c:\Users\tengzhaoju\Desktop\Test'.
[info]: OmniSharp.Script.ScriptProjectSystem
Did not find any CSX files
[info]: OmniSharp.WorkspaceInitializer
Configuration finished.
[info]: OmniSharp.Stdio.Host
Omnisharp server running using Stdio at location 'c:\Users\tengzhaoju\Desktop\Test' on host 6872.
[info]: OmniSharp.MSBuild.ProjectManager
Loading project: c:\Users\tengzhaoju\Desktop\Test\Test.csproj
[info]: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'c:\Users\tengzhaoju\Desktop\Test\Test.csproj'.
[info]: OmniSharp.MSBuild.ProjectManager
Adding project 'c:\Users\tengzhaoju\Desktop\Test\Test.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
Update project: Test
[info]: OmniSharp.Roslyn.CSharp.Services.Diagnostics.CSharpDiagnosticWorkerWithAnalyzers
Solution initialized -> queue all documents for code analysis. Initial document count: 4.
Received response for /v2/getcodeactions but could not find request.
```

## Steps to reproduce

* `dotnet new console` command create a simple project
* Copy below code to `Program.cs` file:
```C#
namespace MySpace
{
public class A
{
public int totalCount;

public void Test()
{
totalCount = 0;
}
};

public abstract class LoopScrollRect
{
public int totalCount;

public class FillContentEvent : A { }
}
}
```
* Now, I can't see codelens,
* However, if I comment out `public class FillContentEvent : A { }` line, codelens appear again:

This bug exists in v1.25.2 and v1.25.1, It works well in v1.25.0.